html {
    background-image: -webkit-radial-gradient(ellipse farthest-corner at center top, #000d4d 100%, #000105 100%);
    background-image: radial-gradient(ellipse farthest-corner at center top, #000d4d 100%, #000105 100%);
}

body {
    margin: 0 0;
    padding: 0 0;
    overflow: hidden;
}

.header {
    width: 90%;
    margin: 30px auto;
}

.header-title {
    font-size: 26px;
    color: rgba(1, 193, 178, 1);
}

.header p {
    font-size: 16px;
    color: white;
    float: right;
}

.header p a {
    color: rgba(1, 193, 178, 1);
}

.main {
    margin: 0 auto;
    width: 90%;
    text-align: center;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
}

.card {
    width: 24%;
    height: 200px;
    background: rgba(0, 255, 255, .9);
    color: black;
    cursor: pointer;
    text-align: left;
    margin: 5px 5px;
}

.card:hover {
    background: rgba(0, 240, 255, .9);
}

.card p {
    margin-top: 10px;
    margin-left: 20px;
    font-size: 20px;
}

.card img {
    display: block;
    margin: 10px auto;
    width: 100px;
}

footer {
    margin-top: 1vh;
    width: 100%;
    height: 10vh;
    /*background: lightgrey;*/
}